Haku Bro: If you are in Delhi just only for transit, then dont go thru immigration. before going to immigration, tell the officer or airline staff there that you are in transit and flying to Kathmandu. I just got back a week ago. Delhi is not a fun Airport to be in. I went thru immigration and this punjabi dude asked me to open all my luggage. I had some electronics and told me that I have to pay 40,000 IC duty. I hesitate paying any, finally this dude told me never to come back on this airport. If you are flying from USA to KTM, I suggest you use Thai. Peace of mind and extra luggage space goes a long way. Again my 2 paisa thought.